Back when I was in college, one of my most frustrating experiences involved a roommate in my dormitory apartment who mistakenly believed that she would be able to wake up daily for her 8:30am lecture series. Said roommate could sleep through an elephant parade. Oh how I seethed in the mornings as I clutched my pillow to my head, begging for the noise to pleasepleaseplease just STOP. If only this alarm were available back then. The Silent Alarm Clock, designed by Johan Brengesjo, uses a wireless rubber ring that vibrates to wake you up in a tactile, noiseless fashion. Though it's just a concept device right now, somebody ought to make and market one right quick. Think of how many friendships it could save! [Yanko Design]